海水环境下2024铝合金腐蚀磨损性能研究

Corrosion Wear Properties of 2024 Al-Alloy in Artificial Seawater

采用往复式销盘摩擦试验机和电化学工作站研究了2024铝合金/Al_2O_3陶瓷在海水环境下的腐蚀磨损行为以及腐蚀磨损之间的交互作用。结果表明：在模拟海水实验条件下,2024铝合金在开路电位下的腐蚀磨损量明显大于其在阴极保护条件下的磨损量,说明腐蚀与磨损发生交互作用。纯磨损量约占总腐蚀磨损量的比例（W_0/T）为70.3%～98.2%,在腐蚀磨损过程中磨损作用明显大于腐蚀作用。腐蚀磨损交互作用量占总腐蚀磨损量的比例（S/T）为1.8%～29.7%,腐蚀磨损交互作用同样不可忽视。

The tribocorrosion behavior of 2024 Al-alloy in artificial seawater was studied, using a pin-on-disk reciprocating friction and wear tester integrated with a potentiostat for electrochemical test. The result showed the material loss caused by wear-corrosion processes without cathodic pro- tection was larger than that with cathodic protection, indicating synergistic effect of mechanical wear and corrosion process. The ratio of the mechanical wear to the total degradation ranged from 70.3% to 98.2%, which indicated mechanical wear component prevailed over the corrosion compo- nent. The proportion of the mass loss caused by wear-corrosion synergism to the total degradation was between 1.8% and 29.7%, and therefore the wear-corrosion synergism could not be neglected.